{"id":452932,"date":"2026-02-19T09:24:52","date_gmt":"2026-02-19T09:24:52","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/sph-water-compression-in-ls-dyna-tank-model\/"},"modified":"2026-02-19T09:24:52","modified_gmt":"2026-02-19T09:24:52","slug":"sph-water-compression-in-ls-dyna-tank-model","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/sph-water-compression-in-ls-dyna-tank-model\/","title":{"rendered":"SPH Water Compression in LS-DYNA Tank Model"},"content":{"rendered":"<p>&lt;div data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Hello,&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;I am currently modeling a water-filled vessel in LS-DYNA.&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;The vessel structure is modeled using shell elements, and the water is modeled using SPH particles.&nbsp; The vessel is subjected to earthquake records.&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;The adopted dimensions are ton-mm-s-N&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;The issue I am encountering is that the water appears to compress excessively ( please see the video)&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;EOS_MURNAGHAN&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;K=2200&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;GAMMA= 7&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;SPH SECTION&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;CSLH 1.2&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;HMIN 1&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;HMAX 1.1&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;SPH CONTROL&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;IDIM 1&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;NMMNEIGH 250&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;FORM 15&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;MAXV 0&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;BODY LOAD Y WITH DR&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Sph mass 17.3 ton&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Sph particle mass 0.0032 ton&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Number of sph particle 5409&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Sph material&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;09- NULL&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;RO 1.000e-09&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;MU=0&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Automatic node surface contact&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;SFSA= 2&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;FSSB= 1&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;SOFT= 1&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;SOFSC= 0.1&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;I would appreciate it if you could share your recommendations on how to resolve this issue.&lt;\/div&gt;&lt;div class=&#8221;elementToProof&#8221; data-ogsc=&#8221;rgb(0, 0, 0)&#8221;&gt;Thank you in advance for your support.&lt;\/div&gt;<\/p>\n","protected":false},"template":"","class_list":["post-452932","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["452932"],"_bbp_subscription":["653899","58821"],"_bbp_author_ip":["83.225.120.201"],"_bbp_last_reply_id":["452939"],"_bbp_last_active_id":["452939"],"_bbp_last_active_time":["2026-02-19 11:14:15"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["653899","58821"],"_btv_view_count":["94"],"_bbp_topic_status":["unanswered"]},"test":"amirhossein-nikpourcern-ch"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/452932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/452932\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=452932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}